Lambda the Ultimate

I am skeptical about this idea getting approved, and even then further skeptical of it actually being used, but I think that LtU could benefit from some extra tags. In particular, Usability/Human Factors would be a nice tag to have, perhaps breaking it into two tags: Human Factors (Real Usability) and Wadler's Law :)

In addition, I think forum old timers are complaining quite a bit lately about stuff being "off-topic". Rather than try to plaster the problem with a Rules&Regulations document, the best way to solve this problem is through some sort of "network of trust". Currently, a network of trust already exists. The old timers trust the moderators to make the right front page content choices. However, some stuff is "maybe off-topic" and others are "definitely off-topic". Moderators could tag things with such, and old-timers can have their newsreaders set-up to filter out definitely off-topic and maybe even maybe off-topics.

Why FPL are (mostly) based on GRS instead of LTRS? Recursive let seems not be so useful, but cyclic links in data makes automatic reasoning very hard and gives another evil source of nontermination.

Perhaps if LTRS was selected we are full of useful total functional languages nowadays.

Ruby has method_missing.

What other languages have solid support for such interceptors?

There is much interest in considering catchalls for a future version of Javascript:
http://wiki.ecmascript.org/doku.php?id=strawman:catchalls

What are the pros and cons of having interceptors in a language?