Join game
Add bot to opposite team
Deploy sentry/seeker
Sentry/seeker starts shooting at bot
Kick bot
Sentry/seeker continues to shoot at the empty space that was previously occupied by the bot
It should be noted that if you deploy your item after the player has already left, a sentry will not begin attacking the empty space, but a seeker will begin attacking the empty space (at least in my testing)
Example:
Join game Add bot to opposite team Deploy sentry/seeker Sentry/seeker starts shooting at bot Kick bot Sentry/seeker continues to shoot at the empty space that was previously occupied by the bot
It should be noted that if you deploy your item after the player has already left, a sentry will not begin attacking the empty space, but a seeker will begin attacking the empty space (at least in my testing)