[cabbageears]

    function modifyElements(pSel, cSel, rxStr) {
        const regex = new RegExp(rxStr, 'i');
        const pEls = document.querySelectorAll(pSel);
        pEls.forEach(pEl => {
            const fEl = pEl.querySelector(cSel);
            if (fEl && regex.test(fEl.textContent)) {
                pEl.style.display = 'none';
            }
        });
    }
    
    let rx = /(hi are u lonely|want (an )?ai gf?)/i;
    
    modifyElements(".athing.comtr", ".comment", rx);

People can add onto the regex as needed, I guess. I haven't seen enough of the comments to be more specific since that seemed to get them. :-/