@SlackHQ I understand why you're showing this warning (and I think it's good!), but is there any chance you could make an exception for @github PRs?
Slack channels don't have a monopoly on the hash character after all 
pic.twitter.com/cL9KYKEYc5
We don't have plans to offer service specific exception to that link security measure. It should happen anytime you hyperlink a URL — regardless of octothorp ownership 
-
-
It only happens when the link text starts with a # -- presumably because it looks like a channel link.
-
Ah, we see what you mean! This is something we'd have to have a noodle on, thanks for the feedback, Benjamin.
Koniec rozmowy
Nowa rozmowa -
Wydaje się, że ładowanie zajmuje dużo czasu.
Twitter jest przeciążony lub wystąpił chwilowy problem. Spróbuj ponownie lub sprawdź status Twittera, aby uzyskać więcej informacji.