The direction given to the attendants for the next International convention in the SW part of the US was: If someone causes problems or needs to be escorted out, security personnel will be called. Not JW security, the venue's security-off duty police officers or the venue's security personnel.
Attendants are not to touch any individuals causing a problem but in the case they get physical, gloves are off. The attendant can defend himself and/or his family.
No other guidance or information was given about security searches other than the expected searches done by the venue's entrance personnel.