Can someone explain to me why I get these sent to me on IRC.

I dont have autoaccept on, and kickban anyone I see ( In channels I have the option to)

But I dont understand why people do this.

You'll see these sent to you because you join a channel that someone with a virus is residing upon. The people involved do not do this themselves, but the virus has hooked into mIRC (usually the vector of infection) and is monitoring everyone who joins. Sometimes, you will find that if you had auto-accept on that you would be being invited into strange channels also.

Please, please, please, realise that the person inviting or sending you the virus is most likely VERY UNAWARE that they are infected and you should message them to let them know.

due to the sheer volume we are encountering we are just kick banning at the moment. we are available in another channel if people want to question it.

Interestingly, the channels you are on are hidden... mmm... investigation as to which porn and sexual deviant channels you are on is in order.... :D

I dont just use efnet ;)