Mobile Alert Systems are hostile level 25 Alarm-o-bots found in Gnomeregan. They reacts on intruders, and if not killed quickly, they call in reinforcement Mechanized Guardians. The mobs called by the alarm bots are almost guaranteed to cause a wipe; they are all Elites, and too many of them come for any party to deal with (unless you have some VERY high-level players in the group with you).