Reason: Matching the original punctuation. Not sure if it's standard to include quotes (started the don't_say_lazy tag originally without them), but bringing it up in case we want to do so with it.
Oops, forgot about that. Just the exclamation point on "No, Thank You!" then...
EDIT:
Forbidden characters
The following characters are stripped from tags: commas and semicolons.
Yet it appears we do have quite a few tags with semicolons (winking expressions, 5pb./Nitroplus games). I guess the help section is mistaken or outdated at least as far as semicolons go?