A GAA club packing bags in an Antrim supermarket were told to remove their tops following complaints.
Children from the St Comghall's club in the town were involved in the charity exercise last weekend.
Among the complainants was Antrim deputy mayor, Adrian Watson.
The group were forced to remove their shirts as a result of the public outcry.
Alliance MLA David Ford claimed it was "deeply frustrating" that a "few people showed their pettiness by objecting to the wearing of GAA tops."
"I know from my own experience in Tesco in Antrim that the company likes people to wear t-shirts identifying themselves as they pack bags," he said
"Given the positive way that the GAA has engaged with the local council and the community I am extremely annoyed at this reaction from some.
"I heard no unionist objections when people stood in silence on the Randalstown Road when they came out to express sympathy at the death of the two soldiers at Massereene Barracks."
Reacting to the controversy, a spokesman from Tesco said: "On Sunday, we had a number of very vociferous complaints both in person and on the phone, including one from a political representative regarding the wearing of the GAA shirts while the group were collecting."
He added: "It is understandable that our duty manager then deviated from Tesco policy and asked that those packing should do so in plain T-shirts."