Ontario PC Leader Tim Hudak in Toronto's Liberty Village Tuesday, Dec. 4, 2012. (Craig Robertson/Toronto Sun)

TORONTO -- A warning from a union representing elementary school teachers that its members could be fined up to $500 a day for refusing to participate in strike actions is an "insult" to the profession of teaching, PC Leader Tim Hudak says.

A Nov. 27 bulletin from the Elementary Teachers' Federation of Ontario (ETFO) says teachers could also be named in a federation publication or refused non-mandated union services for failing to take part in job actions.