Nope, PC goes down for a variety of technical issues, nothing to do with you posting here.
For example, when there's too much server load (not entirely sure what goes on there, but it's a technical term for something), or when someone IP searches (that slows PC, but hey sometimes if conditions are right it can kill it) and other moderation/administration reasons that I'm not even fully aware of myself. And even in general, it goes down on the 15th and 1st of every month (for about an hour) as apart of the scheduled maintenance. In other words, PC dies really easily, but... not because a user is posting in a certain section. XD
Either way, it's safe to say that you're not the cause of PC's downtime, so no need to worry about that. :x Plus, it's been about 25 minutes and PC hasn't gone down, totally proven now :)