the rest

code/game/machinery/quantum_pad.dm

@@ -162,6 +162,9 @@
 				if(QDELETED(ROI))
 					continue //sleeps in CHECK_TICK
 
+				if(isliving(ROI) && !check_mob_teleportability(ROI))
+					continue
+
 				// if is anchored, don't let through
 				if(ROI.anchored)
 					if(isliving(ROI))
@@ -184,6 +187,10 @@
 		linked_pad = link
 		. = TRUE
 
+/// Checks if the mob is able to be teleported.
+/obj/machinery/quantumpad/proc/check_mob_teleportability(mob/living/mob_to_check)
+	return TRUE
+
 /obj/item/paper/guides/quantumpad
 	name = "Quantum Pad For Dummies"
 	info = "<center><b>Dummies Guide To Quantum Pads</b></center><br><br><center>Do you hate the concept of having to use your legs, let alone <i>walk</i> to places? Well, with the Quantum Pad (tm), never again will the fear of cardio keep you from going places!<br><br><c><b>How to set up your Quantum Pad(tm)</b></center><br><br>1.Unscrew the Quantum Pad(tm) you wish to link.<br>2. Use your multi-tool to cache the buffer of the Quantum Pad(tm) you wish to link.<br>3. Apply the multi-tool to the secondary Quantum Pad(tm) you wish to link to the first Quantum Pad(tm)<br><br><center>If you followed these instructions carefully, your Quantum Pad(tm) should now be properly linked together for near-instant movement across the station! Bear in mind that this is technically a one-way teleport, so you'll need to do the same process with the secondary pad to the first one if you wish to travel between both.</center>"