PostgreSQL Constraints and Foreign Keys - Dropping Tables

[Sbob <sbob@xxxxxxxxxxxxxxxxxxxxx>]

I just saw a post indicating that PostgreSQL Foreign Keys and 
Constraints are actually managed via triggers, therefore instead of 
doing a DROP TABLE CASCADE I could just disable triggers.


Is this true?


If so it 'feels' like there may be dangerous side effects, any thoughts 
on any cautions and gotcha's to this approach?


Thanks in advance