▁tags ▁that ▁are ▁attached ▁to ▁mer ch and ise ▁and ▁cause ▁an ▁alarm ▁to ▁sound ▁on ▁exit ing ▁the ▁store . ▁Some ▁stores ▁also ▁have ▁detection ▁systems ▁at ▁the ▁entrance ▁to ▁the ▁bath rooms ▁that ▁sound ▁an ▁alarm ▁if ▁someone ▁tries ▁to ▁take ▁un pa id ▁mer ch and ise ▁with ▁them ▁into ▁the ▁bath room . ▁Reg ular ly , ▁even ▁when ▁an ▁alarm ▁does ▁sound , ▁a ▁shop l if ter ▁wal ks ▁out ▁cas ually ▁and ▁is ▁not ▁confront ed ▁if ▁no ▁gu ards ▁are ▁present ▁because ▁of ▁the ▁high ▁number ▁of ▁false ▁al ar ms , ▁especially ▁in ▁m alls , ▁due ▁to ▁" tag ▁poll ution " ▁where by ▁non - de activ ated ▁tags ▁from ▁other ▁stores ▁set ▁off ▁the ▁alarm . ▁This ▁can ▁be ▁overcome ▁with ▁newer ▁systems ▁and ▁a ▁properly ▁trained ▁staff . ▁Some ▁new ▁systems ▁either ▁do ▁not ▁alarm ▁from ▁" tag ▁poll ution " ▁or ▁they ▁produce ▁a ▁specific ▁alarm ▁when ▁a ▁customer ▁enters ▁the ▁store ▁with ▁a ▁non - de activ ated ▁tag ▁so ▁that ▁store ▁personnel ▁can ▁remove ▁or ▁de activ ate ▁it ▁so ▁it ▁does ▁not ▁produce ▁a ▁false ▁alarm ▁when ▁exit ing ▁the ▁store . ▁However , ▁sp ider ▁wrap ▁may ▁be ▁used ▁instead ▁of ▁tags . ▁ ▁Some ▁tags ▁are ▁stuck ▁onto ▁mer ch and ise ▁with ▁gl ue ▁( r ather ▁than ▁being ▁super im posed ▁on ) ▁the ▁shop l if ter ▁can ▁easily ▁scra pe ▁off ▁the ▁tag ▁in ▁their ▁pocket . ▁Ped est al