Everything else Wave said is confirmed, as they are part of the basic rules. The tile touching thing: that's a matter of formality.
wavemotion wrote:2. As far as I know there is no penalty for touching a tile. I don't think you are required to draw it. But I tend to play friendly games so we wouldn't enforce such a rule unless the person was fondling it

This reminds me. A couple of years ago, I was out bike riding and came across this public place, where chess boards were literally painted on concrete tables. So, y'got people with chess clocks and chess sets out there. If you want to play, you wager a dollar and hope to beat the opponent. I lost 3 times.

The neat thing there was: play with one hand only. Move pieces with one hand, and hit the clock with the same hand.
For casual -- no one really cares about these kinds of formalities.
But for EMA, I'm going to assume it is coded in there. Going through the EMA rules and doing a word search for "touch", the word finder isn't locating the word. So, I'm going to assume -- "No". I've never played in an EMA event, as I am in America. Nevertheless, it's something interesting to consider regarding the establishment of a more formal set of rules around here. Draw the tile from the wall -- you're committed to it. At least, this is my opinion.
The only time this could be an issue: when deciding to call on a discard. Otherwise, drawing from the wall is the default choice anyways.