There are dozens of types of these “effects”.
𝔅𝔩𝔞𝔠𝔨𝔩𝔢𝔱𝔱𝔢𝔯, 𝒮𝒸𝓇𝒾𝓅𝓉, 𝔻𝕠𝕦𝕓𝕝𝕖-𝕊𝕥𝕣𝕦𝕔𝕜, Ⓒⓘⓡⓒⓛⓔⓓ, uʍop-ǝpısd∩ …
If you really want to ban it, make it part of your rules, just as you would with questionable content. Not everything can be prevented through technical measures.