I really don't know how these things work, but they can be put into a map to block ways, and people won't have to download anything. If you want to know more about this, you should contact a guy called Orx, if I remember right.
Thanks for letting me know Juuel. I've seen this before i guess, but not sure where it was so i'll take a look at it tonight with password on server and ensure you we can do something about it Thanks again.
Inform me later whenever you discover some new buggy spots such as these.