Remember that woman who was arrested because her phone indicated she was at a house that was burgled at exactly that time? Police just do a dragnet. Turns out she just drove by the house as it was happening.
In the above example, imagine someone did an anti Israel terror attack in the area. Everyone mentioning such things will be found via dragnet searches and who knows if you just happen to have been nearby when it happened while also making suspicios SMS messages.
Dragnets are profoundly likely to catch innocent people. Protect yourself from them however you can. That should be in everyone's threat model.
This is why cafepress exists.