It is not acceptable for anyone to take pictures with your phone or any other means of anyones portfolio. That is stealing and you can be arrested for theft of intellectual property.
U.S.C. § 501
Violation of any of the exclusive rights of the copyright owner
as provided by 17 U.S.C. §§ 106-122, 602, including the right
to control reproduction, distribution, public performance, and
display of copyrighted works.
(1) Injunctions, 17 U.S.C. § 502.
(2) Impounding, destruction, or other reasonable disposition of: all copies made in
violation of the copyright owner’s rights; all plates, molds, matrices, masters, tapes,
film negatives, or other articles by means of which such copies may be reproduced;
and any records documenting the manufacture, sale, or receipt of things involved in
the violation—the court shall take such records into custody and shall enter an
appropriate protective order (with respect to discovery and use of the records) that
assures that confidential information contained in such records is not improperly
disclosed or used, 17 U.S.C. § 503.
(3) Actual damages suffered by the copyright owner due to the infringement, and
any profits of the infringer attributable to the infringement, 17 U.S.C. § 504(b).
(4) Statutory damages (at the copyright owner’s election to recover in lieu of actual
damages and profits), in the amount of not less than $750 or more than $30,000 as
the court deems just, 17 U.S.C. § 504(c)(1). For willful infringement, a court may, in
its discretion, increase the statutory da
mages award to a sum of not more than
$150,000, 17 U.S.C. § 504(c)(2).b
(5) Costs and attorney’s fees, 17 U.S.C. § 505.