just find out one blowcrypt.
a good blowcrypt must have an option "if key exists then encrypt and reply if key used", this means the bot will never talk in plaintext if you have any blowkey enabled to one #.
no idea how is your blowcrypt script , so enable that option if you have, and if your blowcrypt doesn't have any test function, add somethin like this to blowcrypt.tcl