I personally don’t have an issue taking food from the lounge to enjoy in the privacy of your room. In fact some lounge attendants have even promoted this. For example in Berlin and Taipei.

Here - The hotel has graciously extended MR members with breakfast - a benefit not required from resort properties but they go beyond that in offering a full buffet breakfast not a continental breakfast, and they go even further by extending it not only to platinum members but gold members too!

Instead of being grateful you have someone filling up a tupperware container with items from the buffet and concealing it in a bag - to enjoy a picnic lunch to hold them over to happy hour with free canapés and wine and boasting about it - is just sneaky, tacky and shameful.