I am not assuming anything. I think if neighbours are regularly going onto someones property and taking pictures that alone speaks volumes. Most homes that I know of don't have 'No Trespassing' signs, so does that mean that all are open to neighbours coming in to take pics? I also just posted a post explaining what happened to someone I know insofar as trespassing being alleged wrongly by police. Trespassing is trespassing....IMO
"Trespass an offence
2. (1) Every person who is not acting under a right or authority conferred by law and who,
(a) without the express permission of the occupier, the proof of which rests on the defendant,
(i) enters on premises when entry is prohibited under this Act, or
(ii) engages in an activity on premises when the activity is prohibited under this Act; or
(b) does not leave the premises immediately after he or she is directed to do so by the occupier of the premises or a person authorized by the occupier,
is guilty of an offence and on conviction is liable to a fine of not more than $2,000. R.S.O. 1990, c. T.21, s. 2 (1)."
''Arrest without warrant on premises
9. (1) A police officer, or the occupier of premises, or a person authorized by the occupier may arrest without warrant any person he or she believes on reasonable and probable grounds to be on the premises in contravention of section 2. R.S.O. 1990, c. T.21, s. 9 (1).''
Any part of Section 2 being violated is grounds for arrest according to the ''Act''
http://www.e-laws.gov.on.ca/html/statutes/english/elaws_statutes_90t21_e.htm