Online social networkers must adhere to the rules of netiquette.
Although rules of etiquette and "netiquette" are much more relaxed in current times than in years past, it's still a good idea to limit cards with off-color or devilish humor to people you know very well.
Since this takes place in a very controlled and regulated environment, it is an excellent way to introduce students to proper netiquette and blogging techniques without worrying about inappropriate content or links.
The inclusion of a happy face or another form of smiley or emoticon helps to show immediately whether a comment is meant as a joke or in a light hearted way and is a great use of netiquette.
It's better "netiquette" to simply let them find the MySpace surveys on your site and then choose whether or not they'd like to actually take part in them.