Developer Update: I am a student and have exams at the moment. My plugins have not been abandoned and I will pick them up in July and make them more awesome than ever with the 3 months off that I will have. Sorry for any inconvenience caused.
This plugin (in combination with Residence) allows you to set a flag that will disable all teleports/warps in and out of a location. This has a wide array of uses including protecting private or secret areas from people who can use the /tp command or "trapping" players in areas so they have to complete a task, without being able to warp out.
To use this plugin you will require residence. Once it is installed you can then use the following command in a res to disable warping:
/res set warp false
And to enable warping:
/res set warp true