I had moved most of my stuff by chance the other day to https://vircurex.com/ because I wanted to convert to LTCs but now I'm worried that the same thing might happen to vircurex.com as well... Can anyone shine some light on this site in particular? Are the owners/the owner on this forum?
Generally speaking, how safe are these exchanges, if at all?
No exchange is safe. They take a safe decentralized peer2peer network and turn it into a central point of attack.
Use market places like bitcoin.de if you don't want to get robbed.