To insist on any down payment for booking without first letting the prospect view and inspect the premise first is already wrong. Don't try to wriggle your way out, you scum.

Wait, didn't you say there are ALOT of people waiting to rent the room/house? 
Why do you even need TS's money then? Doesn't make sense.
Throughout the entire process of real estate rentals, no one has ever paid to book a place they have yet to inspect, nor would anyone demand payment first before letting their prospect inspect. You, sir, are a first of a kind retarded scammer
FFK or not, if you have other students to rent, let them rent la! Are you dumb or what?
Case isn't close. You attempted to SCAM a person but got caught red handed.
Amendment of any tenancy agreement must be signed and acknowledged by the tenant and owner and stamped. You cannot simply amend it without the tenant's signature.

Forfeiture of deposit is applicable only to physical damages to the premise, fixtures and fittings, not to the owner! You, the owner, don't rent your body to people, do you?  Such includes damage to walls, paints, holes from nails, plumbing, etc, which were to be inspected and acknowledged by the tenant to be in good condition before moving in, and must maintain as such once the tenant moves out.

No where did it say anything about damages to the OWNER, like getting FFK or raped or buttsecked!

Don't try to con your way out scammer.