Why can't people send you an e-mail asking for being on your list? & think having your e-mail instantly allows them to add you :) & not use it to actually E-MAIL you to ask for a chat "if needed" ?
Am not saying that they are bad people! NO but am saying that we miss the "excuse me, I want to talk to you if you may allow me to? For the reason [x]" part. We have to ask people politely if we wish to talk to them not just be there then expect them to talk to us freely :> its kinda hard & some how embarrassing.
For me I don't like strangers to pop into my screen! But if that stranger gave me a good introduction & cleared out what they want "the reason they want to chat for" then its cool :} its nice to know people but politeness is a must :}
Then ther comes the "block" part. Now if we chat with some one on MSN or any other mean for IM, we can't expect people to want to talk to us 24/7. Some easilly say "excuse me I dont want/cant talk to you know! others may block you for the same reason but they just don't say it! which is not nice nor polite BUT "understandable" & doesn't invade any ones privacy on the contray it allows some one to be more relaxed! if they don't wish to chat to a certain some one then its their right.
The bad thing comes in not telling if you want to block some one (they do have the right to know! they are the 2nd party in the chat, you know). Although I never blocked any one because I can simply say "I dont want to talk now" I only block if I wish to delete some contact & before that I tell them so, because they do too have the right to know if they ask they surelly have the right to know don't just lie to them! or leave them blank!