User alrezza21 (name of the ancients) has 450 problems solved within a single week, submitting one solution after another. Must be a genius.
16 days later
I'm sorry, but again it is very obvious that Rully Soelaiman15 continues submitting others solutions:
Solutions to NWERC11A .. NWERC11J are those of Jonathan Schmidt-Dominé ...
Every single one of Rully Soelaiman's submissions to my problems have been either one of the judges' official solutions, or solutions taken out from different Chinese blogs which are not his.
15 days later
14 days later
I really don't like this unresolved situation. Rully Soelaiman is/was one of the top users and I think it's a high priority. His account is still active and he once is and once isn't on the ranking list. Please resolve this situation and either clear him of cheating suspicions or delete the account with all the submissions, so that they are also not included in specific problem lists.
That doesn't look like real problem solving: https://www.spoj.pl/status/souptikpro/36
I also doubt that. Too many tough problems solved in HASK on the first attempt. I think that happens if people publish their solutions, which cant be avoided.
Marked activity these last three days.
I'm not here since many times, but imho, this situation is very strange. So silent.
I saw him on AU1215, a very easy problem, with few submissions, his solution seems to have different memory usage than the ones with similar execution time.
But so many suspicions were shown...
13 days later
hello admin...plz check how dis person is submitting 58 ques in a span of 3 hours...further the name used within as his name is also is rubbish...plz ban such type of users its all in your hand...
1 month later
User allada aka Revanth submitted solutions for Bytecode 2012 contest problems in quick succession. (Submissions 6611507 to 6611545.) The questions are mostly on the difficult side..
I just point it out as suspicious so that the problem setter (or an admin) can, if they want, look into it and see if submissions match official solutions or some other form of cheating. The user had some trouble with much easier problems (such as PRIME1), based on profile and recent submissions. He also submitted several NWERC 2011 solutions right afterward in the same fashion. So a number of factors make it look strange.
In the end though, I feel like even pointing out such things is maybe a waste of time. Could be spending the time solving problems or other interesting things. People wanting to cheat will always exist, and they won't gain very much from cheating, and the points/ranking dilution is generally not very extreme anyway..
. My sentiments are the same.I notice that this14 user (ancient rank #3) is no longer present in the list "all of fame".
Now Lordxfastx and : D are #3 and #4.
I don't know since how many time it is done, but it seems a good decision.
I bet that this submission (#6659701) of arena isn't genuine !!!
Same timing and memory as another one.
What can be done more with that ???
18 days later
Removing from rank list is an option that every user can chose for his account.
And: Nevertheless as long as his account is still valid, he reduces points of other users.
Moreover user arena9 is going on submitting others' solutions:
His AC submission for my own problemset LINQSOLV4 is identical to the (older) AC submission of user atetubou12.
2 months later
On one of my problems, 'REBOUND' : The return of the cake
snehasish_roy (alias : Better late than never !!!)
submitted some submissions, and 2min later,
i_am_back1 (alias : Guess_who_is_back)
had submitted the same.
It's motto is : It looks really nice to see no WA's in ur status 
Edit : This problem1 is proposed, but the setter didn't solve FACT0 nor other good factoring problem ! I find this more than curious, and non sense in fact.
I have a new copy/paste for REBOUND, from http://www.spoj.pl/users/aradhya71/2 ; it's python submission is a pure copy of http://www.spoj.pl/users/jhanvi/3 one.