Thailand Tourist Rules for Foreigners

Much ado in the media complaining about Chinese tourists behavior.
Women washing their feet in a basin.  There was a sign in English prohibiting the practice, with a warning of a 1,000 baht fine.  

It's doubtful that the majority of Chinese tourists read English.

Thailand wants tourists from all over the world to come and experience Thailand.

To accommodate all languages picture signs should be used, similar as to the picture educating Thais on the proper use of a western toilet

Unfortunately Thais tend to make up new rules as they go along.  I hung all my wet clothes including underwear outside a major hotel window on ropes intended for flags.  Songkran 2000. That evening everyone had followed suit.  The hotel front looked like a laundry facility, bras, bikinis, and other unmentionables included.  No complaints.
Drying your unmentionables in the open at the airport in the airport lounge may be a bit tacky, but not a reason for a national uproar.
And OH YES:  Don't wear just white during songkran.  When wet it becomes see through.
As for kicking bells with your feet, when I visited there many moons ago, there was a sign, "Do not ring the bells, they are fragile."