To answer your question, Only interceptors, Heavy Interdictors and Smart bombing Battleships can get you.
In a pod none only the battleship is going to get you, in a shuttle maybe the interceptor will get you, and a frigate will be caught by all 3.
EDIT: It is also possible battlecruisers (usually a Hurricane) to tackle your frigate, it is not often used as a consequence the hurricane is striped of almost all tank, and damage mods, it is there with the specific purpose of snatching frigates at gates, if they have a gang supporting them with remote sensor boosting they may also get a shuttle, but your pod will be safe (unless you get lag) pod's warp in under 2 seconds and they require at least this to lock it. Just make sure you click warp rather than align. :)
Your main enemy in Low sec is not these things though, it's Lag unfortunately.
I've only lost a handful of ships in low-sec in my time, and 3 out of the 6 have been to severe gate lag from a fleet exiting the gate and me being decloaked.
From the rest, 2 of them were from Fluke decloaks and only 1 was pilot error.