Harassment violates AOL's terms of use; the first thing you should do is contact them. Email them a description of the problem along with the user's screen name and, if possible, copies of the offending messages. AIM also gives you the option of warning and/or blocking a user; you might just want to block the person and let it go at that. Read through AIM's online help for more info on blocking and warning.
Dealing with this sort of problem by yourself is not the first course of action to take,and probably isn't a course that should be taken at all.
By the way,
This isn't really an appropriate forum for your question, as this forum is for discussing and resolving networking-related hardware and software problems.
DMR
Wombat At Large
7,229 posts since Dec 2003
Reputation Points: 221
Solved Threads: 370
A program....
Why does it even matter?
Slade
Practically a Master Poster
633 posts since Mar 2004
Reputation Points: 115
Solved Threads: 7
Hey- Chill out.
As I've said, your question isn't suited to this forum, and I've already told you what the proper course of action should be. Additionally, some of the methods that could possibly be used to obtain the info you want are themselves illegal in some situations, and we don't do the hacks and cracks thing here because of that.
Look, just because someone IMs you saying they have your IP or other information:
A) In and of itself does not make them a stalker.
B) Doesn't even mean that they really have the information they say they do.
C) Doesn't necessarilly mean that they can do anything with that info even if they do have it.
Get yourself behind a good firewall, harden your system, block IMs from this "stalker", and let him go find someplace else to play.
DMR
Wombat At Large
7,229 posts since Dec 2003
Reputation Points: 221
Solved Threads: 370