Do you think is it going "overboard" to ask your partner to delete their facebook if they want to be in a serious relationship with you?

Just curious what peoples thoughts are on this. Facebook has been in the news a lot lately in relation to failed marriages and what not. Of course everyone is well aware of the havoc that facebook and other social networking sites can have on relationships (due to the easiness of reconnecting with past lovers and old romances) and I have experienced social networking “drama” in my past relationships as well. So my question is this: If someone you have been dating pops the question and asks you to be their mate (we are talking serious relationships here), is it too much to ask them to refrain from social networking sites? Of course this would be a two way, mutual street. What are your thoughts?