In many gatherings speakers identify themselves by twitter handles instead of email. Do you think that is sound? No, I very much dislike that. Part of it

In many gatherings speakers identify themselves by twitter handles instead of email. Do you think that is sound? No, I very much dislike that. Part of it is that I am (by choice, for sure), not able to use that information, but part of it is, as you say, an objection to a single commercial offering having that position.