someone could possibly use that message, address and signature to impersonate you on other platforms... For instance, someone could create a Telegram account called @ene1980_ and then send someone that signed message and say "see, I'm Ene1980 from Bitcointalk, you can trust me".
Thanks for all the suggestion, i never thought like that
This is my address
bc1q8u77jpwcyuv6xdqa0cfwd469ax79lhe7v69n39
Someone quote me.
-----BEGIN BITCOIN SIGNED MESSAGE-----
This is Ene1980 from Bitcointalk. The date today is 29/05/2019 and I am staking address bc1q8u77jpwcyuv6xdqa0cfwd469ax79lhe7v69n39
-----BEGIN SIGNATURE-----
bc1q8u77jpwcyuv6xdqa0cfwd469ax79lhe7v69n39
H3Y1woVWkHz5KhpxNl9GyRvWEno4Uh7j6/o2GgfUze16L9mJEbYjlhu10oVodGvtBDSRuOSMbvjPUoHEr8nS4Vc=
-----END BITCOIN SIGNED MESSAGE-----