tcp md5 bgp attacks?

so we started to wonder if, since we started protecting our bgp sessions with md5 (in the 1990s), are there still folk trying to attack? we were unable to find bgp mib counters. there are igp interface counters, but that was not our immediate interest. we did find that md5 failures are logged. looking at my logs for a few years, i find essentially nothing; two 'attackers,' one my own ibgp peer, and one that noted evildoer rob thomas, bgprs01.ord08.cymru.com. we would be interested in data from others. note that we are neither contemplating nor suggesting removing md5 from [y]our bgp sessions. randy