local pub parlay cards

[twistedbeats]

like most pubs, my local offers weekly parlay cards. the thing is, some of the lines are so far off, i feel like i'm being offered a teaser at parlay prices. for instance, this week, pats are -20 vs washington, tampa bay is +3 (was that a typo or did the line really move that much?) vs jacksonville, and indi is -10 vs carolina. and that's just pro ball.

so, my two questions are:
a) can i post every week looking for advice? i know little about the nfl, and nothing about college ball, but figure there's gonna be enough bad lines to find a profitable card each week.

b) is this honorable? these things are supposed to be for little more than bragging rights and here i am trying to beat the system as hard as i can