Legal Guardian Farm?

Hey this is Kabluto, 

                             Just writing to see if this guardian farm design is considered legal.
Of course the spawn rates won't be as efficient as shown, and the exp part of it will have an on and off switch to stop the build up of mobs. I just don't want to start building a design only to find out it will cause server lag. (Below are some videos I've watched of the design)

MumboJumbos Video: https://www.youtube.com/watch?v=1gGqDJXS5Bg
Original Creator: https://www.youtube.com/watch?v=H7l8cJzdcxE

Thanks any and all feedback is welcome!

BTW the actual build will be less intense than what is shown in the original creators video

I see nothing wrong with the design of the farm that would cause crazy lag to the server. All i would say is.1 dont let it build up tp much 2 use it as a grinder not an afk farm. But this is just my input. I would wait to heard from a staff member before you fully continue

Alright thanks I will stand and wait for staff approval but yes I would not use this as an afk machine (mostly cause it's illegal) but more for the blocks and the exp.