it's hard to say, he installed it with out you're permision so uninstalling it is cool, I DO use ICQ and have found it to be a good program with very few problems and I don't get bugged by a bunch of spam, (like MSN does and AIM does) both of which are well used systems for hackers and forpeople to GET IN through. ICQ is a bit more secure and is the oldest of the lot. I think they may have been bought out by one of the bigger ones, AIM I think. He is away from HOME and as a way to stay connected he wanted to use ICQ to speak/chat with friends & family. you can set it to record all info exchanged and that will help protect you and him from making (err bad choices) anyhow it an also share FILES so installing a good FIREWALL such as Norton or Mcaffee would be well advised. also make sure there is a good pass word protection set up, (comes with Norton Password manager with the systems suit ) somethign similar is sold by many names.
anyhow keep up the good work monitor him and such.
Mark M