I may be wrong but I think that FC are banning pepole for using Beacon Warp to get inside /move around Camelot.
See the stater page for RK3 for more details .. iffy Babelfish translation below
Current News
Beacon Warp after Camelot did not forbid getting a using by Beacon Warp around people after Camelot is longer permitted and like a Exploit is treat/punished. Funcom is endeavored around a better solution.