Larouse is not any kinder to them than Wikipedia.
Something to bear in mind - the Greeks and Romans both added lead to their wines. The Greeks were also known to add other intoxicants to their wines, ranging from poppy (opium) to resins (including hashish). The lead at the least could cause long term problems with mental stability.
Add this to some of the more ecstatic religious practices and you have a recipe for insanity, both permanent and temporary. Given that some of the proclivities assigned the maenads included the eating of raw meat... the result is fairly savage.
Cybele's (though an import she was sometimes associated with Bacchus) worship was no less mad - the priests being known to emasculate themselves at the height.
While dated, and no longer considered entirely accurate Frazer's The Golden Bough
is an excellent gaming resource. Later authors, including Campbell, have built upon this foundation.
The Auld Grump