Or is there some insidious problem looming, causing havoc with our previously extremely reliable navigation tool - the compass?

BBC: Reverse polarity a risk to climbers, mountain body warns

Norovirus spreads easily via contaminated food or drinking water, but a more insidious route is from a person touching a surface contaminated with the residue of stool or vomit from an infected person and then touching his or her mouth before hand-washing.

FORBES: Magazine Article

Auditors too would be freed from the insidious pressure of selling or reviewing colleagues' work.

ECONOMIST: Accountancy

Is this an insidious conspiracy of public institutions to use taxpayer money to bail out private banks or just smart capitalists responding to unwise incentives?

FORBES: Magazine Article

Be it pink doctor kits in toy stores or steakhouses with lipstick mirrors in the desert menus, the pervasive nature of marketing entertainment to women accomplishes two insidious goals.

FORBES: How Hollywood Markets to Women by Reinforcing Gender Stereotypes