[routing-wg] Hijacking

Please excuse me for this rather naive question, but I really
don't know the answer.   (And in the present context, I would
very much like to know.)

Do the contracts that various entities, including but not
limited to LiRs, sign with RIPE, in exchange for being issued
RIPE number reources, include any sort of a stipulation or
condition that the parties agree not to deliberately and
with malice aforethought announce routes either (a) using
AS numbers which have not been issued to them by one of the
five Regional Internet Registries and/or (b) covering IP
address space that has not been formally issued to them, or
to any of their legitimate customers by one of the five
Regional Internet Registries?

I guess that another way of expressing this question would be:
Do RIPE contracts allow anyone to announce whatever the hell they
want, willy nilly, and with no concern whatsoever for the formal
allocation process?

I wouldn't ask, but it appears that certain RIPE members do not
feel particularly constrained to avoid announcing routes to IP
address space that they are clearly and deliberately stealing from
other parties.

Is this the accepted norm in the RIPE region?  Is such behavior
it contractually permissible, within the RIPE region?