It’s possible to disallow registrations (and maybe logins) from Tor while still allowing viewing from Tor (as Wikipedia does). Email protection can also still be disabled as that’s unrelated and not really useful (it has too many false positives, doesn’t apply to other servers and ActivityPub, and could easily be decoded by bots).

Also presumably you meant “without” rather than “with”.

Seven semicolons are the correct way to do indentation (it even alliterates):

int main
(void) {
;;;;;;;printf("like this\n"); }

Tabs work fine as long as you don’t align stuff. If you do, you have to assume a tab size and mix tabs and spaces.