I apologize for the inconvenience!
The next time this happens please find out what your current IP is (e.g. visit http://www.whatsmyip.org/
where it's shown on the very top of the page) and send this information to ardik(at)bookcrossing.com.
I can then check whether it's indeed blocked and can unblock it.
== Further information:
We do block several IPs and even IP ranges due to malicious behaviour. Many of them try to register new users a few hundred times a day.
Unfortunately in rare cases this can hit fully legitimate and totally innocent users:
- When you're connected from home, typically your IP changes once a day. That way a blocked IP could suddenly be assigned to you.
- When multiple "attacks" come from different IPs in a close range we are blocking the whole range. We try to keep it as small as sensibly possible but it may still include innoncent IPs.
We tend to unblock most of those IPs after a while - but this takes several weeks or more.