They have lost three times at home this season, including a 1-0 loss to Scunthorpe, and were lucky to earn a point with a late equaliser against Blackpool in midweek.
Megson warned: "When other sides come here, it¹s their big game and they raise their game because of that.
"Clubs now can look at other sides who have come here and think: 'if they can do it, then so can we'.
"The big crowd and tradition of the club inspires others to do well so we must be more resilient when playing at home."